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首页> 外文期刊>Polyhedron: The International Journal for Inorganic and Organometallic Chemistry >Syntheses, structures and properties of copper(II) complexes with thiophene-2,5-dicarboxylic acid (H_2Tda) and nitrogen-containing ligands
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Syntheses, structures and properties of copper(II) complexes with thiophene-2,5-dicarboxylic acid (H_2Tda) and nitrogen-containing ligands

机译：带有噻吩-2,5-二羧酸（H_2Tda）和含氮配体的铜（II）配合物的合成，结构和性质

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Five copper(II) complexes with thiophene-2,5-dicarboxylic acid (H_2Tda): Cu(Tda)(H_2O) centre dot (H_2O)_2 (1), Cu(Tda)(im)_2 centre dot (H_2O) (2), Cu(Tda)(im)_4 (3), [Cu(Tda)(py)_2]_n (4) and [Cu(Tad)(bipy)(H_2O)_n] centre dot n[Cu(Tda)(bipy)(H_2O)_2] centre dot 2nH_2O (5) (im = imidazole, py = pyridine and bipy = 2,2'-bipyridine) have been synthesised and their spectroscopic and thermal properties investigated. Three of them (3, 4 and 5) are structurally characterised and the Cu atom is in five coordinate, distorted square pyramidal environments. The thiophene-2,5-dicarboxylate molecule is monodentate in 3 in which the molecular structure is stabilised by intermolecular hydrogen bonding involving two of the four non-coordinated nitrogen atoms of the imidazole ligands and carboxylate groups from adjacent Tda~(2-). In 4 the thiophene-2,5-dicarboxylate ion is bridging tridentate and bonded to three copper atoms to form a chain polymer with alternating 16-membered ring bridged by two Tda~()2- and an 8-membered ring bridged by two carboxylates. Complex 5 comprises discrete [Cu(Tda)(bipy)(H_2O)_2] (5a), one dimensional zig-zag chain of [Cu(Tda)(bipy)(H_2O)]_n (5b) and water molecules of crystallization. The thiophene-2,5-dicarboxylate molecule is monodentate in 5a and involved in intermolecular stacking interactions with 2,2'-bipyridine rings, and bidentate in 5b to bridge [Cu(bipy)(H_2O)] to form a one dimensional zig-zag chain.
机译：五种与噻吩-2,5-二羧酸（H_2Tda）形成的铜（II）配合物：Cu（Tda）（H_2O）中心点（H_2O）_2（1），Cu（Tda）（im）_2中心点（H_2O）（ 2），Cu（Tda）（im）_4（3），[Cu（Tda）（py）_2] _n（4）和[Cu（Tad）（bipy）（H_2O）_n]中心点n [Cu（Tda ）（bipy）（H_2O）_2]中心点2nH_2O（5）（im =咪唑，py =吡啶，bipy = 2,2'-联吡啶）已合成，并对其光谱和热性质进行了研究。其中三个（3、4和5）具有结构特征，并且Cu原子处于五个坐标，扭曲的方锥环境中。噻吩-2,5-二羧酸酯分子在3中是单齿的，其中分子结构通过分子间的氢键稳定，该氢键涉及咪唑配体的四个非配位氮原子中的两个和来自相邻Tda〜（2-）的羧酸酯基团。在4中，噻吩2,5-二羧酸根离子桥接三齿并键合到三个铜原子上，形成链聚合物，其中交替的16元环被两个Tda〜（）2-桥接，而8元环被两个羧酸酯桥接。络合物5包括离散的[Cu（Tda）（bipy）（H_2O）_2]（5a），[Cu（Tda）（bipy）（H_2O）] _ n（5b）的一维之字形链和结晶水分子。噻吩-2,5-二羧酸盐分子在5a中是单齿的，并参与与2,2'-联吡啶环的分子间堆积相互作用，在5b中是双齿以桥接[Cu（bipy）（H_2O）]以形成一维Zig-曲折链。

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